Stark Effect and Generalized Bloch-Siegert Shift in a Strongly Driven Two-Level System
Abstract
A superconducting qubit was driven in an ultrastrong fashion by an oscillatory microwave field, which was created by coupling via the nonlinear Josephson energy. The observed Stark shifts of the “atomic” levels are so pronounced that corrections even beyond the lowest-order Bloch-Siegert shift are needed to properly explain the measurements. The quasienergies of the dressed two-level system were probed by resonant absorption via a cavity, and the results are in agreement with a calculation based on the Floquet approach.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2010
- DOI:
- arXiv:
- arXiv:1005.3446
- Bibcode:
- 2010PhRvL.105y7003T
- Keywords:
-
- 85.25.Cp;
- 42.50.Ct;
- 71.70.Ej;
- Josephson devices;
- Quantum description of interaction of light and matter;
- related experiments;
- Spin-orbit coupling Zeeman and Stark splitting Jahn-Teller effect;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Quantum Physics
- E-Print:
- 4+ pages